SWRM_MCP_SLV_STATUS
ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val);
ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &val);
ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &status);
ctrl->reg_read(ctrl, SWRM_MCP_SLV_STATUS, &slave_status);